[30318] | 1 | ###############################################################################
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| 2 | #
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| 3 | # DBDrivers/JDBM.pm -- utility functions for writing to jdbm databases
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| 4 | #
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| 5 | # A component of the Greenstone digital library software from the New Zealand
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| 6 | # Digital Library Project at the University of Waikato, New Zealand.
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| 7 | #
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| 8 | # Copyright (C) 1999-2015 New Zealand Digital Library Project
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| 9 | #
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| 10 | # This program is free software; you can redistribute it and/or modify it under
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| 11 | # the terms of the GNU General Public License as published by the Free Software
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| 12 | # Foundation; either version 2 of the License, or (at your option) any later
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| 13 | # version.
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| 14 | #
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| 15 | # This program is distributed in the hope that it will be useful, but WITHOUT
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| 16 | # ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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| 17 | # FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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| 18 | # more details.
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| 19 | #
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| 20 | # You should have received a copy of the GNU General Public License along with
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| 21 | # this program; if not, write to the Free Software Foundation, Inc., 675 Mass
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| 22 | # Ave, Cambridge, MA 02139, USA.
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| 23 | #
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| 24 | ###############################################################################
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| 25 |
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| 26 | package DBDrivers::JDBM;
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| 27 |
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| 28 | # Pragma
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| 29 | use strict;
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| 30 |
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| 31 | # Libraries
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| 32 | use util;
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| 33 | use FileUtils;
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[30338] | 34 | # - OO inheritence
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| 35 | use parent 'DBDrivers::BaseDBDriver';
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[30318] | 36 |
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| 37 | sub BEGIN
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| 38 | {
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[30338] | 39 | if (!defined $ENV{'GSDLHOME'} || !defined $ENV{'GSDLOS'}) {
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| 40 | die("Error! Environment must be prepared by sourcing setup.bash\n");
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| 41 | }
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[30318] | 42 | }
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| 43 |
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[30338] | 44 |
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| 45 | ## @function constructor
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| 46 | #
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[30318] | 47 | sub new
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| 48 | {
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| 49 | my $class = shift(@_);
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[30338] | 50 | my $self = DBDrivers::BaseDBDriver->new();
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| 51 | $self->{'default_file_extension'} = 'jdb';
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| 52 | bless($self, $class);
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| 53 | return $self;
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[30318] | 54 | }
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[30338] | 55 | ## constructor() ##
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[30318] | 56 |
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[30338] | 57 |
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[30318] | 58 | # -----------------------------------------------------------------------------
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| 59 | # JDBM IMPLEMENTATION
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| 60 | # -----------------------------------------------------------------------------
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| 61 |
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| 62 | # When DBUtil::* is properly structured with inheritence, then
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| 63 | # much of this code (along with GDBM and GDBM-TXT-GZ) can be grouped into
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| 64 | # a shared base class. Really it is only the the command that needs to
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| 65 | # be constructed that changes between much of the code that is used
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| 66 |
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[30338] | 67 | # Handled by BaseDBDriver
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| 68 | # sub get_infodb_file_path {}
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| 69 |
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| 70 |
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| 71 |
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[30318] | 72 | sub open_infodb_write_handle
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| 73 | {
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[30338] | 74 | my $self = shift(@_);
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| 75 | my $infodb_file_path = shift(@_);
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| 76 | my $opt_append = shift(@_);
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| 77 | if (!defined $opt_append) {
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| 78 | $opt_append = '';
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| 79 | }
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| 80 | $self->_debugPrint('("' . $infodb_file_path . '","' . $opt_append . '")');
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[30318] | 81 |
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[30338] | 82 | my $jdbmwrap_jar = &FileUtils::filenameConcatenate($ENV{'GSDLHOME'},"bin","java", "JDBMWrapper.jar");
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| 83 | my $jdbm_jar = &FileUtils::filenameConcatenate($ENV{'GSDLHOME'},"lib","java", "jdbm.jar");
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[30318] | 84 |
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| 85 | my $classpath = &util::pathname_cat($jdbmwrap_jar,$jdbm_jar);
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| 86 |
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| 87 | if ($^O eq "cygwin") {
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| 88 | # Away to run a java program, using a binary that is native to Windows, so need
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| 89 | # Windows directory and path separators
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| 90 |
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| 91 | $classpath = `cygpath -wp "$classpath"`;
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| 92 | chomp($classpath);
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| 93 | $classpath =~ s%\\%\\\\%g;
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| 94 | }
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| 95 |
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| 96 | my $infodb_file_handle = undef;
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| 97 | my $txt2jdb_cmd = "java -cp \"$classpath\" Txt2Jdb";
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| 98 |
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[30338] | 99 | if ($opt_append eq "append") {
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[30318] | 100 | $txt2jdb_cmd .= " -append";
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| 101 | print STDERR "Append operation to $infodb_file_path\n";
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| 102 | }
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| 103 | else {
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| 104 | print STDERR "Create database $infodb_file_path\n";
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| 105 | }
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| 106 |
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| 107 | # Lop off file extension, as JDBM does not expect this to be present
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| 108 | $infodb_file_path =~ s/\.jdb$//;
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| 109 |
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| 110 | if ($^O eq "cygwin") {
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| 111 | $infodb_file_path = `cygpath -w "$infodb_file_path"`;
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| 112 | chomp($infodb_file_path);
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| 113 | $infodb_file_path =~ s%\\%\\\\%g;
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| 114 | }
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| 115 |
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| 116 | $txt2jdb_cmd .= " \"$infodb_file_path\"";
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| 117 |
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| 118 | if (!open($infodb_file_handle, "| $txt2jdb_cmd"))
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| 119 | {
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| 120 | print STDERR "Error: Failed to open pipe to $txt2jdb_cmd";
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| 121 | print STDERR " $!\n";
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| 122 | return undef;
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| 123 | }
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| 124 |
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| 125 | binmode($infodb_file_handle,":utf8");
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| 126 | return $infodb_file_handle;
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| 127 | }
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| 128 |
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| 129 |
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| 130 |
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| 131 | sub close_infodb_write_handle
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| 132 | {
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| 133 | my $infodb_handle = shift(@_);
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| 134 |
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| 135 | close($infodb_handle);
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| 136 | }
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| 137 |
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| 138 |
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| 139 | sub read_infodb_file
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| 140 | {
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| 141 | my $infodb_file_path = shift(@_);
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| 142 | my $infodb_map = shift(@_);
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| 143 |
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| 144 | my $jdbmwrap_jar = &util::filename_cat($ENV{'GSDLHOME'},"bin","java", "JDBMWrapper.jar");
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| 145 | my $jdbm_jar = &util::filename_cat($ENV{'GSDLHOME'},"lib","java", "jdbm.jar");
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| 146 |
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| 147 | my $classpath = &util::pathname_cat($jdbmwrap_jar,$jdbm_jar);
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| 148 |
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| 149 | if ($^O eq "cygwin") {
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| 150 | # Away to run a java program, using a binary that is native to Windows, so need
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| 151 | # Windows directory and path separators
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| 152 |
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| 153 | $classpath = `cygpath -wp "$classpath"`;
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| 154 | chomp($classpath);
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| 155 | $classpath =~ s%\\%\\\\%g;
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| 156 |
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| 157 | $infodb_file_path = `cygpath -w "$infodb_file_path"`;
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| 158 | chomp($infodb_file_path);
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| 159 | $infodb_file_path =~ s%\\%\\\\%g;
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| 160 | }
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| 161 |
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| 162 | my $jdb2txt_cmd = "java -cp \"$classpath\" Jdb2Txt";
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| 163 |
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| 164 | open (PIPEIN, "$jdb2txt_cmd \"$infodb_file_path\" |") || die "couldn't open pipe from db2txt \$infodb_file_path\"\n";
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| 165 | binmode(PIPEIN,":utf8");
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| 166 | my $infodb_line = "";
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| 167 | my $infodb_key = "";
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| 168 | my $infodb_value = "";
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| 169 | while (defined ($infodb_line = <PIPEIN>))
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| 170 | {
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| 171 | $infodb_line =~ s/(\r\n)+$//; # more general than chomp
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| 172 |
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| 173 | if ($infodb_line =~ /^\[([^\]]+)\]$/)
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| 174 | {
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| 175 | $infodb_key = $1;
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| 176 | }
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| 177 | elsif ($infodb_line =~ /^-{70}$/)
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| 178 | {
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| 179 | $infodb_map->{$infodb_key} = $infodb_value;
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| 180 | $infodb_key = "";
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| 181 | $infodb_value = "";
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| 182 | }
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| 183 | else
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| 184 | {
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| 185 | $infodb_value .= $infodb_line;
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| 186 | }
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| 187 | }
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| 188 |
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| 189 | close (PIPEIN);
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| 190 | }
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| 191 |
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| 192 | sub read_infodb_keys
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| 193 | {
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| 194 | my $infodb_file_path = shift(@_);
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| 195 | my $infodb_map = shift(@_);
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| 196 |
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| 197 | my $jdbmwrap_jar = &util::filename_cat($ENV{'GSDLHOME'},"bin","java", "JDBMWrapper.jar");
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| 198 | my $jdbm_jar = &util::filename_cat($ENV{'GSDLHOME'},"lib","java", "jdbm.jar");
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| 199 |
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| 200 | my $classpath = &util::pathname_cat($jdbmwrap_jar,$jdbm_jar);
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| 201 |
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| 202 | my $jdbkeys_cmd = "java -cp \"$classpath\" JdbKeys";
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| 203 |
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| 204 | open (PIPEIN, "$jdbkeys_cmd \"$infodb_file_path\" |") || die "couldn't open pipe from jdbmkeys \$infodb_file_path\"\n";
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| 205 | binmode(PIPEIN,":utf8");
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| 206 | my $infodb_line = "";
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| 207 | my $infodb_key = "";
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| 208 | my $infodb_value = "";
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| 209 | while (defined ($infodb_line = <PIPEIN>))
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| 210 | {
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| 211 | # chomp $infodb_line; # remove end of line
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| 212 | $infodb_line =~ s/(\r\n)+$//; # more general than chomp
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| 213 |
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| 214 | $infodb_map->{$infodb_line} = 1;
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| 215 | }
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| 216 |
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| 217 | close (PIPEIN);
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| 218 | }
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| 219 |
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| 220 |
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| 221 |
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| 222 | sub write_infodb_entry
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| 223 | {
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| 224 |
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| 225 | my $infodb_handle = shift(@_);
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| 226 | my $infodb_key = shift(@_);
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| 227 | my $infodb_map = shift(@_);
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| 228 |
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| 229 | print $infodb_handle "[$infodb_key]\n";
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| 230 | foreach my $infodb_value_key (keys(%$infodb_map))
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| 231 | {
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| 232 | foreach my $infodb_value (@{$infodb_map->{$infodb_value_key}})
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| 233 | {
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| 234 | if ($infodb_value =~ /-{70,}/)
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| 235 | {
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| 236 | # if value contains 70 or more hyphens in a row we need to escape them
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| 237 | # to prevent txt2db from treating them as a separator
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| 238 | $infodb_value =~ s/-/&\#045;/gi;
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| 239 | }
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| 240 | print $infodb_handle "<$infodb_value_key>" . $infodb_value . "\n";
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| 241 | }
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| 242 | }
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| 243 | print $infodb_handle '-' x 70, "\n";
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| 244 | }
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| 245 |
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| 246 |
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| 247 | sub write_infodb_rawentry
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| 248 | {
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| 249 |
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| 250 | my $infodb_handle = shift(@_);
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| 251 | my $infodb_key = shift(@_);
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| 252 | my $infodb_val = shift(@_);
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| 253 |
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| 254 | print $infodb_handle "[$infodb_key]\n";
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| 255 | print $infodb_handle "$infodb_val\n";
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| 256 | print $infodb_handle '-' x 70, "\n";
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| 257 | }
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| 258 |
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| 259 | sub set_infodb_entry
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| 260 | {
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| 261 | my $infodb_file_path = shift(@_);
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| 262 | my $infodb_key = shift(@_);
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| 263 | my $infodb_map = shift(@_);
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| 264 |
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| 265 | # HTML escape anything that is not part of the "contains" metadata value
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| 266 | foreach my $k (keys %$infodb_map) {
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| 267 | my @escaped_v = ();
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| 268 | foreach my $v (@{$infodb_map->{$k}}) {
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| 269 | if ($k eq "contains") {
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| 270 | push(@escaped_v, $v);
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| 271 | }
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| 272 | else {
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| 273 | my $ev = &ghtml::unescape_html($v);
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| 274 | push(@escaped_v, $ev);
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| 275 | }
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| 276 | }
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| 277 | $infodb_map->{$k} = \@escaped_v;
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| 278 | }
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| 279 |
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| 280 | # Generate the record string
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| 281 | my $serialized_infodb_map = &dbutil::convert_infodb_hash_to_string($infodb_map);
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| 282 | ### print STDERR "**** ser dr\n$serialized_infodb_map\n\n\n";
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| 283 |
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| 284 | # Store it into JDBM using 'Txt2Jdb .... -append' which despite its name
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| 285 | # actually replaces the record if it already exists
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| 286 |
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| 287 | my $jdbmwrap_jar = &util::filename_cat($ENV{'GSDLHOME'},"bin","java", "JDBMWrapper.jar");
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| 288 | my $jdbm_jar = &util::filename_cat($ENV{'GSDLHOME'},"lib","java", "jdbm.jar");
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| 289 |
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| 290 | my $classpath = &util::pathname_cat($jdbmwrap_jar,$jdbm_jar);
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| 291 |
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| 292 | # Lop off file extension, as JDBM does not expect this to be present
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| 293 | $infodb_file_path =~ s/\.jdb$//;
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| 294 |
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| 295 | if ($^O eq "cygwin") {
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| 296 | # Away to run a java program, using a binary that is native to Windows, so need
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| 297 | # Windows directory and path separators
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| 298 |
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| 299 | $classpath = `cygpath -wp "$classpath"`;
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| 300 | chomp($classpath);
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| 301 | $classpath =~ s%\\%\\\\%g;
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| 302 |
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| 303 | $infodb_file_path = `cygpath -w "$infodb_file_path"`;
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| 304 | chomp($infodb_file_path);
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| 305 | $infodb_file_path =~ s%\\%\\\\%g;
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| 306 | }
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| 307 |
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| 308 | my $cmd = "java -cp \"$classpath\" Txt2Jdb -append \"$infodb_file_path\"";
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| 309 |
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| 310 | my $status = undef;
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| 311 | if(!open(GOUT, "| $cmd"))
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| 312 | {
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| 313 | print STDERR "Error: jdbm::set_infodb_entry() failed to open pipe to: $cmd\n";
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| 314 | print STDERR " $!\n";
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| 315 | $status = -1;
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| 316 | }
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| 317 | else {
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| 318 | binmode(GOUT,":utf8");
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| 319 |
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| 320 | print GOUT "[$infodb_key]\n";
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| 321 | print GOUT "$serialized_infodb_map\n";
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| 322 |
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| 323 | close(GOUT);
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| 324 | $status = 0; # as in exit status of cmd OK
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| 325 | }
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| 326 |
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| 327 | return $status;
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| 328 | }
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| 329 |
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| 330 |
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| 331 |
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| 332 |
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| 333 | sub delete_infodb_entry
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| 334 | {
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| 335 | my $infodb_handle = shift(@_);
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| 336 | my $infodb_key = shift(@_);
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| 337 |
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| 338 | # A minus at the end of a key (after the ]) signifies 'delete'
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| 339 | print $infodb_handle "[$infodb_key]-\n";
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| 340 |
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| 341 | # The 70 minus signs are also needed, to help make the parsing by db2txt simple
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| 342 | print $infodb_handle '-' x 70, "\n";
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| 343 | }
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| 344 |
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| 345 | 1;
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